Process of and apparatus for weighing paper



J. B. BUEHLER ET AL PROCESS 0! AND AYPARATUS FOR WEIGHING PAPER Filed Dec. 50-, 1921 2 Shuts-Sheet 1 May 19, 1925 1,538,615

J. B. BUEHLER ET AL PROCESS OF AND APPARATUS FOR WEIGHING PAPER Filed Dec. 30, 1921 2 Shuts-Sheet 2 Ill of the invention.

Patented May 19, 1925.

UNITED STATES PATENT OFFICE.

JOHN' B. BUEHLER'AND CONRAD J'. KERN, OF PHILADELPHIA, PENNSYLVANIA.

PROCESS OF AND APPARATUS FOR WEIGHING PAPER.

Application filed December A further object of the invention is to weigh the paper as it is being made and while it is in a wet condition.

These objects we attain in the following manner, reference being had to the accompanying drawings, in which:

Fig. 1 is a side view of suflicient of a paper making machine to illustrate our invention;

Fig. 2 is a transverse sectional view on the line 2-2, Fig. 1, showing the mechanism in detail;

Fig. 3 is a sectional view on the line 33, Fig. 2; and

Fi 4 is a view illustrating a single weig ing mechanism.

In the present instance, the device is shown as located between the end of a paper making apparatus and the drying cylinders, but it may be located at other oints without departing from the essential features 1 is a frame of a paper making machine of any of the usual types. a is the paper, which passes from a belt 2 on'the machine 1 to a roller 3 and over a light roller 4 and between a pair of press rollers 5. 6 is a 'felt, which passes between the rose rollers with the paper, as shown. 11 a bracket 7 is a roller 8 over which the aper passes to a roller 9 carried by the rame 10 of the drier, in the present instance. The paper passes from the roller 9 to the first drying drum 11 and to the second drying drum 12 and so on throughout the length of the drying apparatus.

It will be noticed that the rollers 8 and 9 are spaced apart and that the web of paper is suspended between the rollers. About midway between the two rollers, a roller 13 is located on which the web of paper rests. This roller forms part of the weighing apparatus. light and is connected by lever mechanism- This roller is comparatively 30, 1921. serial No. 525,901.

to a scale of any suitable type, which is preferably provided with an indicator, as shown. 3

In the present instance, the roller 13 is carried by links 14 at eachside of the machine. These links are pivoted at 15 to brackets 7 and to bearings 16, which carry the rollers 13. The other side of the bearings is connected by links 18 to a bracket 17 on the frame 10. These links act to hold the rollers in position laterally. The bearings 16, at each side of the rollers 13,

are connected to levers 19 by cords 20 and the levers are suspended from brackets 21.

by cords 22. 30 is a counterbalance weight on one end of each lever 19. Each lever 19 is connected I by a cord 23 to a lever 24 within a casing :25 of suitable scale mechanism. The lever, in turn, is connected by a cord, or rod, 26 to the beams 27 and to the hand 28 of the recording dial 29.

It will be understood that the scale mechanism may be of any suitable form and it it not shown in detail. In fact, the entire lever mechanism may be modified without departing from the spirit of the invention.

The weight of the paper is determined while the paper is in a wet condition. The weights on the. scale beams 27 are moved to the position at which the paper should be and the indicating hand is so connected to this scale mechanism that, when the beams are set for a given weight of paper, the hand can be moved to the zero mark. As the paper moves through the machine, when there is any difference in weight, the indicator will show this by moving either to one side or the other of the center, or zero mark.

The scale mechanism is preferably located on each side of the machine, as shown in Fig. 2, so that if one side ofthe paper should be heavier than the other, the indicator will show this difference. The mechanism may be so constructed that a single scale mechanism can be used, as shown in Fig. 4, in which the roller 13 is suspended from a beam 13 that is hung from a beam 19. connected to the weighing mechanism.

The amount of moisture in the paper can be readily determined so that the operator can figure the weight which would equal the weight when the paper is dry. In some instances, the apparatus shown may be 10- cated between the last drying cylinders and the calender rollers, or between the calender rollers and the cutters.

Our invention is especially adapted for use in weighing heavy paper such as box board, but it may be used for weighing any type of paper. In fact, if found necessary, it can be used to weigh felts, or fabrics, which are held suspended between two points while traveling over a weighing roll.

We claim:

1. The combination in a machine for weighing paper and like material, of two rollers spaced apart over which the web of paper travels; a weighing roller extending under the web of paper about midway between the two rollers; and indicating scales connected to each end of the weighing roller for indicating the weight of each side of the web of paper.

2. The combination of a weighing apparatus consisting of two rollers spaced spart and over which the web of paper travels; a weighing roller extendin under.

the web of paper about midway tween the two rollers; and scales connected to each end of the weighing roller, each scale having independent indicators. i

3. The combination in a paper making machine, of two rollers spaced apart, one roller being at'the delivery end of the machine and the other at the feed end of a drier so that a web of wet paper will be suspended between the two rollers; a transversely arranged weighing roller extending under the web of paper about midway between the two spaced rollers; a bearing at each end of the weighing roller; links connecting the bearings to a fixed point of the machine;.and scale mechanism at each side of the machine connected to the bearings.

4. The combination in a machine, of two rollers spaced apart, one roller being at the delivery end of the machine and the other at the feed end of a drier so that a web of wet aper will be suspended between the two ro ers; a transversely arran ed weighing roller extending under the web of paper about midway between the two spaced rollers; a bearing at each end of the weighing roller; links connecting the bearings to a fixed point of the machine; scale mechanism at each side of the machine connected to the bearings; and means for holding the roll in a fixed position laterally.

5. The combination in an apparatus for weighing paper while in a wet condition and while being made, of a paper making machine; press rolls around which the paper passes; a guide roller over which the paper passes; bearings for the said guide roller on the frame of the paper making machine; a second uide roller spaced from the first guide rofier; a (1 ing machine frame supporting said secon roller; drying cylinders around which the pa er passes from the roller; weighing mec a nism consisting of an indicating scale; and a li ht roller connected to the scale and exten ing under the web of wet paper about midway between the uide rollers.

6. In a device of t c class described, in combination, means for supporting a. portion of a moving strip of material, and means connected to said supporting means for indicating the variations in welght per paper making unit of length of said strip and for'indioating variations in the weight from side to side of said strip.

JOHN B. BUEHLER. CONRAD J. KERN. 

